title: Polymorphism and evolution of the Rh blood groups.
mesh_terms: D005075:Biological Evolution; D005787:Gene Frequency; D006801:Humans; D008433:Mathematics; D011110:Polymorphism, Genetic; D012204:Rh-Hr Blood-Group System / Q000235:genetics*
chemical_list: D012204:Rh-Hr Blood-Group System